Engine Performance problem
1991 Pontiac Firebird V8 Two Wheel Drive Automatic 106K miles
i recently did a tune up on my 91' firebird 305 tbi. i decided to reset the base timing. the base timing was 6 deg. btdc. i've had pinging probs before but this time i thought it was alright. the engine would not stop pinging until base timing was about 1 degree btdc! now i'm dealing with a serious lack of power. i also noticed that after i reconnected the EST and checked timing again, it was so far adv. it was about an inch and a half away from the marker plate. i checked for vacuum leaks,i have recently replaced the dist and ICM, i dont have any lean mix issues that i know of. Any suggestions?
1991 Pontiac Firebird V8 Two Wheel Drive Automatic 106K miles
i recently did a tune up on my 91' firebird 305 tbi. i decided to reset the base timing. the base timing was 6 deg. btdc. i've had pinging probs before but this time i thought it was alright. the engine would not stop pinging until base timing was about 1 degree btdc! now i'm dealing with a serious lack of power. i also noticed that after i reconnected the EST and checked timing again, it was so far adv. it was about an inch and a half away from the marker plate. i checked for vacuum leaks,i have recently replaced the dist and ICM, i dont have any lean mix issues that i know of. Any suggestions?
Apr 14, 2009 at 5:26 PM